石斛除能养阴清热外,还具有的功效是()黄精除能滋肾润肺外,还具有的功效是()
A.清心除烦
B.明目强腰
C.补脾益气
D.益肾健骨
E.润肠通便
参考答案:B,C
Miss. Gao _______ in the library for three years. But now she is a teacher.
A.worked
B.has worked
C.had worked
D.has been working
运输合同的特征包括( )。
A.原则上是双务、有偿合同
B.既有诺成性合同,也有实践性合同
C.客体为运输行为或运输劳务
D.全部为标准合同
E.具有强制缔约性